Puppy 5.2 uses unique Puppy scripts. Puppy loads and runs entirely from Ram, for speed. Puppy has optimised programs and wizards.
Puppy 5.2 is a woof build (Puppy creation technology, allowing Puppy to be partially built from Debian and Ubuntu compiled programs and libraries). Puppy 5.2 retains the name 'Puppy Lucid' but uses 10.10 binaries from Maverick Meerkat, offering further compatibility.
Internal development used the name 'Luci'. So for example a download is called luci-242
Puppy can be built with packages from almost any distro, using Woof.
All the underlying infrastructure, boot scripts, basically everything that makes Puppy unique, is in Woof. Above Woof, there is a layer of specialised system-level PETs that we have created ourselves, and these vary from different Puppy builds. Lucid Puppy has special system-level PETs, which contribute to making Lucid different from other puppies built from Woof.
A Puppy can be built with packages of any other distro, as well as our own native PET application packages. Lucid Puppy 5.1 is built with Ubuntu packages, about 60% Ubuntu, 40% our PETs. You can consider that as applications that go on top of Woof and the system-level PEts.
So basically, you have a unique Puppy, different from any other distro, but using some of the application packages from another distro, including the libraries, so able to install any other packages from that distro.
Puppy can be built from almost any other distro's packages also, including Debian, Slackware and Arch.

Gnome-mplayer defaults now to X11 video for compatibility with all video drivers (specifically the nv driver). For higher quality, please change to the ‘xv’ driver in Edit -> Preferences. Of course, it might be good also to update to the higher performance driver in Quickpet -> Drivers.
Thumbnails are turned off by default. To turn them on, Right-Click on an icon and choose Rox-Riler -> Options.